Count

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Get the number of items in the collection

public function count(): int;

Cannot be negative.

Returns

• int - Returns the number of items in the collection